Unfortunately once purple primer comes into contact with any material, the affect is permanent.
The date is written in Julian format. The first group of five numbers is the date of manufacture and is read as follows, i.e. 14045. The first two numbers are the year and the last three numbers are the day of the year. 14=2014 and 045=February 14th, so the date of manufacture is February 14th, 2014.
The date codes on all PVC, ABS and CPVC cements / Primers and Cleaners are located on the bottom of can.
PVC & ABS Cements / Primers and Cleaners have 3 year shelf life from date of manufacture, and CPVC has 2 year shelf life from date of manufacture. See more in our blog.